Improvement in steam-plows



UNITE STATES A'rnN'r GFFICE.

MIRABEAU N. LYNN, OF NEW ALBANY, INDIANA, ASSIGNOB TO HIMSELF ANDEDVVABD II. MANN, OF SAME PLACE.

IMPROVEMENT IN STEAM-PLOWS.

Specification forming part of Letters Patent No. 116,610, dated July 4,1371.

To all whom it may concern Be it known that I, MIRABEAU N. LYNN, of NewAlbany, in the county of Floyd and State of Indiana, have invented anImproved Motion for the Pushing Legs of Steam-Blows 5 and I do herebydeclare that the following is a full, clear, and exact descriptionthereof', reference being' had to the accompanying drawing making partof this specication, in which- Figure l is a side elevation, showing twopushing-legs and the improved device for operating them. Fi 2 shows thesame parts in a different position. Fig. 3 is a vertical cross-sectionthrough the toothed yoke and its driving-wheel. Fig. 4 is a diametricalsection through a pushing-foot which I use with the 1' ushing-legs.

Similar letters of reference indicate coresponding parts in the severaligures.

This invention relates to an improved mode of operating the pushing-legsof steam-plows, the same being an improvement on the steam-plow patentedby me May 31, 1870. The nature of my invention consists: 1st, incombining with areetilinear movable slide, having pushing-legs appliedto it, a reciprocating toothed yoke and rotatin g driving-wheel, wherebya regular rotary motion imparted to said wheel will communicate therequired forward-and-backward movements to the pushing-legs, as will behereinafter eX- plained. 2d, in a novel kind of foot for a pushing-leg,which foot presents to the surface of the ground an India-rubber soleand a vacuum chamber, as will be hereinafter explained.

To enable others skilled in the art to understand my invention, I willdescribe its lconstruction and operation.

In the accompanying drawing I have only represented two pushing-legs andthe improved device for operating them, but it should be understood thatin practice there will be a gang of these pushing-legs arranged beneaththe bed A of the carriage, side by side, and driven from a single shaft,I. It should also be stated that in practice the several1i airs ofpushing-legs will be aryanged in such relation to each other that whileone pair is moving backward another pairwill be moving forward, therebygiving a regular or continuous progressive movement to the carria ge.

A represents the bed of a carriage, which is to be mounted upontransportin g-wheels, and which is to have a steam-boiler, steam-engineor engines,

gang of plowshares, and other things necessary to a steam-plow, appliedto it. B represents a slide, which is arranged beneath the bed A andguided by staples a., or other suitable means, which will allow thisslide a free endwise motion in the direction of the length of thecarriage. By means of ball-and-socket joint-s b, or in any othersuitable manner, the pushing-legs O O are attached to the slide. Theselegs incline backward and downward, and are furnished, on their lowerends, with feet tt, so constructed as to prevent the legs from slippingon the ground while making' their propelling stroke, as will be hereinafter explained. The ball-and-socket attachments b b will allow thelegs to receive lateral as well as longitudinal motion, so that theyca-n accommodate themselves to inequalities of surface passed over. Thismode of attaching the legs I do not claim under this applica-tion. Forthe purpose of lifting the legs free from the ground when this isdesired, chains are attached to them, which extend up to windlasses onthe frame of the carriage. I represents a driving-shaft, which isarranged horizontally and transversely beneath the carriage-bed A, and'supported by suitable bearings. This shaft will be rotated, by means ofcranks, connecting-rods, and engines, in any suitable manner.Oscillating engines may be used and their pistonrods connected directlyto the cranks on driving-shaft I. To each one of the slides B apitman-rod, D, is connected by a joint, a e, which rod extends backward,and is rigidly connected to the front end of an oblong toothed yoke, G,through which the driving-shaft I passes. This Ayoke consists ofparallel toothed racks terminated at their ends by semicircular insidespurteeth, as shown in Figs. 1 and 2. J represents a spur-wheel, whichis keyedV on shaft I in the same vertical plane as the yoke G, andintended for giving' mot-ion to this yoke by engaging with its teeth.For the purpose of keeping the teeth of the wheel J and those of theyoke G a-t all times engaged, a piece, s, is applied to the side of theyoke above wheel J, and constructed with beveled ends, and a stud orsmall anti-friction wheel, g, is applied to a lixed pendant guide, H, soas to support the yokeG (when lifted by wheel J, as shown in Fig. 2)during one of the strokes of this yoke, and to hold the yoke down ingear with wheel J during the other strokes. The yoke thus receives fromwheel J longitudinal motion and also a vertical motion. The pendant H,which supports the stud or roller g, also serves as a guide or stay forkeepin g' the yoke in the same place as the drivin g-Wheel J. It mayalso be made to serve as an intermediate bearing for the shaft I tosustain this shaft against the strain to which it is subjected.

Fig. 4 shows one of the feet t in section, eX- posing the socket w andthe ehznnbered Indiarubber sole V. The rubber sole, in conjunction withthe chamber u therein, Will prevent slipping, as this chamber u Operatesin a great measure as it Vacuum space and Causes adhesion Ot' the

